Abstract: An object of the invention is to present service selection to the user immediately when it is made possible to realize a new service with a communication terminal of an associated party. A communication terminal 100 enables the user to use a communication service using a peripheral equipment within a communication range with an associated terminal connected through a network and includes a total control section 104 having a capability information change notification unit for notifying the associated terminal of occurrence of change in the peripheral equipment within the communication range and a service candidate determination unit for determining an available communication service with the associated terminal when change in the peripheral equipment occurs.

Abstract: A relay device (40) comprises: an NW interface (408) for making a connection with a switching source terminal (20) that is receiving media data transmitted from a media server (10) and with a switching destination terminal (30); an information storage (403) for storing a media data processing capacity of the switching source terminal (20) and switching destination terminal (30); a media controller (401) for making a transmission request to the media server (10) for media data corresponding to the above processing capacity in the information storage (403), and for acquiring the above processing capacity of the switching destination terminal (30) from the information storage (403) and instructing to transfer the media data corresponding to the acquired processing capacity to the switching destination terminal (30); a media receiver (404) for receiving the media data transmitted from the media server (10); a media buffer (405) for holding the media data; and a media transmitter (406) for acquiring from the media

Abstract: A switch instruction is transmitted from a PC terminal to a portable PC terminal; the portable PC terminal transmits a switch connection request to a portable communication terminal on the other end of communication; the portable PC terminal, when it is waiting for a response to the switch connection request and receives a switch connection request from the other end of communication, detects that switching processes are being performed simultaneously; upon detection of the simultaneous switching, a switching session related to either switch connection request is determined to be continued; the portable PC terminal, which received the switch connection request to which the switching session determined to be continued was related, transmits a success response including information on the switching process of the portable PC terminal side; and the PC terminal, which received the switch connection request to which the one to be stopped was related, transmits a failure response.

Abstract: A relay device (40) comprises: an NW interface (408) for making a connection with a switching source terminal (20) that is receiving media data transmitted from a media server (10) and with a switching destination terminal (30); an information storage (403) for storing a media data processing capacity of the switching source terminal (20) and switching destination terminal (30); a media controller (401) for making a transmission request to the media server (10) for media data corresponding to the above processing capacity in the information storage (403), and for acquiring the above processing capacity of the switching destination terminal (30) from the information storage (403) and instructing to transfer the media data corresponding to the acquired processing capacity to the switching destination terminal (30); a media receiver (404) for receiving the media data transmitted from the media server (10); a media buffer (405) for holding the media data; and a media transmitter (406) for acquiring from the media

Abstract: A switch instruction is transmitted from a PC terminal (105) to a portable PC terminal (107) (S302); the portable PC terminal (107) transmits a switch connection request to a portable communication terminal (102) on the other end of communication (S306); the portable PC terminal (107), when it is waiting for a response to the switch connection request and receives a switch connection request from the other end of communication, detects that switching processes are being performed simultaneously (S312); upon detection of the simultaneous switching, a switching session related to either switch connection request is determined to be continued (S314 and S315); the portable PC terminal (107), which received the switch connection request to which the switching session determined to be continued was related, transmits a success response including information on the switching process of the portable PC terminal (107) side (S316 and S319); and the PC terminal 101, which received the switch connection request to which

Abstract: A communication control apparatus, communication terminal apparatus, server apparatus, and communication control method are provided that continue video and/or voice communication in a way that feels seamless to the user even when communication conditions change in a mobile environment. Newly introducing a lower layer management section that notifies an upper layer of lower layer information such as field intensity and network congestion into a conventional communication terminal apparatus, which is configured in such a way that this lower layer information is concealed from the application, enables the connection control section that provides the application's service generation environment to recognize lower layer information directly, and makes possible various kinds of status determination and control changes based on lower layer information at the application level.

Abstract: An object of the invention is to present service selection to the user immediately when it is made possible to realize a new service with a communication terminal of an associated party. A communication terminal 100 enables the user to use a communication service using a peripheral equipment within a communication range with an associated terminal connected through a network and includes a total control section 104 having a capability information change notification unit for notifying the associated terminal of occurrence of change in the peripheral equipment within the communication range and a service candidate determination unit for determining an available communication service with the associated terminal when change in the peripheral equipment occurs.

Abstract: A communication terminal (1) comprises a wireless interface (19) for detecting intensity of radio wave that is received via a plurality of networks that use different communication schemes; a movement prediction unit (14) for predicting a destination network based on radio wave intensity detected by the wireless interface (19); and prediction information transmission unit (13) for transmitting a bandwidth reservation request that requests reservation of a bandwidth between a destination network control device (4) controlling communication connection in a destination network that is predicted to be the destination of the communication terminal and a network control device (3) to which the communication terminal is currently connected as well as transfer of currently communicated communication information to the destination network control device, to the network control device to which the communication terminal is currently connected. This enables smooth switching to a different network.